Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
A salesclerk is talking to a customer in an Apple Store.
Salesclerk:"___________"
Customer: "Yes. I'd like to buy a MacBook Air."
A. Do you look for something?
B. Good morning. Can I help you?
C. Excuse me. Do you want to buy it?
D. Can you help me buy something?